JAVA作业-.图书馆查书、借书、还书
1.UML类图
2.功能展示
1. 系统界面
####2.查书功能
（1）查看所有图书
（2）按照作者或书名查书
**####3.查看已借的书并对其进行归或借操作
####4.还书
3.核心代码
1.DAO展示
package library;
import java.util.ArrayList;
public interface CartDao{
public ArrayList<Item> getList();
public void addBook(Book book); //加入书籍
public void deleteBook(int num); //归还书籍
public void showCart(); //查看借阅书的情况
public void clearCart(); //归还所有借阅的书籍
}
2.主函数
package library;
import java.io.IOException;//导入 这个包来捕获输入输出异常
import java.util.ArrayList;
import java.util.Scanner;
public class main {
public static void main(String[] args) throws NumberFormatException, IOException
{
Scanner sc =new Scanner(System.in);
Mall mall=new Mall();
CartDao cart =new CartDaoLisImpl();
System.out.println(" 欢迎来到图书馆");
System.out.println("接下来你将进入图书管理系统");
while(true)
{
System.out.println("1.浏览图书");
System.out.println("2.查找你想要的图书");
System.out.println("3.查看你借的书");
System.out.println("4.归还你借的书");
System.out.println("5.退出");
System.out.println("请输入操作");
int flag=0;
int n=sc.nextInt();
sc.nextLine();
switch(n)
{
case 1:
System.out.println("所有的图书：");
Mall.showAllBook();
System.out.println("请输入你要借的书的编号");
n=sc.nextInt();
while(n>mall.getList().size())
{
System.out.println("抱歉本图书馆暂无该图书，请重新输入！");
n=sc.nextInt();
}
cart.addBook(mall.getList().get(n-1));
break;
case 2:
System.out.println("1.按照书名查找");
System.out.println("2.按照作者查找");
n=sc.nextInt();
sc.nextLine();
if(n==1)
{
System.out.println("请输入你要查找的书名");
String s1=sc.next();
ArrayList<Book> searchOfGoods =Mall.searchName(s1);
//System.out.println(searchOfGoods1.size());
for(int i=0;i<searchOfGoods.size();i++)
{
System.out.println((i+1)+":"+searchOfGoods.get(i));
}
System.out.println("请选择要借的图书的编号:");
n=sc.nextInt();
cart.addBook(searchOfGoods.get(n-1));
}
else
{
System.out.println("请输入你要查找到作者");
String s1=sc.next();
ArrayList<Book> searchOfGoods =Mall.searchPrice(s1);
for(int i=0;i<searchOfGoods.size();i++)
{
System.out.println((i+1)+":"+searchOfGoods.get(i));
}
System.out.println("请选择要借的书的编号:");
n=sc.nextInt();
cart.addBook(searchOfGoods.get(n-1));
}
break;
case 3:
while(flag==0)
{
System.out.println();
System.out.println("******************************************************************************************************");
System.out.println("你的借阅情况如下：");
cart.showCart();
System.out.println("******************************************************************************************************");
System.out.println("1.想再借书");
System.out.println("2.归还书籍");
System.out.println("3.归还所有的书籍");
System.out.println("4.退出借阅表");
System.out.println("请输入操作");
n=sc.nextInt();
switch(n)
{
case 1:
System.out.println("1.浏览书库来借书");
System.out.println("2.查找书籍来借书");
int n1=sc.nextInt();
sc.nextLine();
switch(n1)
{
case 1:
System.out.println("所有的图书：");
Mall.showAllBook();
System.out.println("请输入你要借的书的编号");
n1=sc.nextInt();
while(n1>mall.getList().size())
{
System.out.println("抱歉本图书馆暂无该图书，请重新输入！");
n1=sc.nextInt();
}
cart.addBook(mall.getList().get(n1-1));
break;
case 2:
System.out.println("1.按照书名查找");
System.out.println("2.按照作者查找");
n1=sc.nextInt();
sc.nextLine();
if(n1==1)
{
System.out.println("请输入你要查找的书名");
String s1=sc.next();
ArrayList<Book> searchOfGoods =Mall.searchName(s1);
//System.out.println(searchOfGoods1.size());
for(int i=0;i<searchOfGoods.size();i++)
{
System.out.println((i+1)+":"+searchOfGoods.get(i));
}
System.out.println("请选择要借的图书的编号:");
n1=sc.nextInt();
cart.addBook(searchOfGoods.get(n1-1));
}
else
{
System.out.println("请输入你要查找到作者");
String s1=sc.next();
ArrayList<Book> searchOfGoods =Mall.searchPrice(s1);
for(int i=0;i<searchOfGoods.size();i++)
{
System.out.println((i+1)+":"+searchOfGoods.get(i));
}
System.out.println("请选择要借的书的编号:");
n1=sc.nextInt();
cart.addBook(searchOfGoods.get(n1-1));
}
break;
}
break;
case 2:
System.out.println("请输入要归还书籍的序号");
n=sc.nextInt();
cart.deleteBook(n-1);
break;
case 3:
cart.clearCart();
System.out.println("已归还所有书籍");
break;
case 4:
flag=1;
break;
}
}
break;
case 4:
while(true)
{
System.out.println();
System.out.println("******************************************************************************************************");
System.out.println("你的借阅情况如下：");
cart.showCart();
System.out.println("******************************************************************************************************");
System.out.println("1.归还书籍");
System.out.println("2.归还所有的书籍");
System.out.println("3.退出");
System.out.println("请输入操作");
n=sc.nextInt();
switch(n)
{
case 1:
System.out.println("请输入要归还书籍的序号");
n=sc.nextInt();
cart.deleteBook(n-1);
break;
case 2:
cart.clearCart();
System.out.println("已归还所有书籍");
break;
case 3:
flag=1;
break;
}
break;
}
break;
case 5:
System.out.println("图书馆欢迎您！");
return ;
}
}
}
}
3.查书功能
package library;
import java.io.BufferedReader;//读取文本
import java.io.FileReader;//读取文件
import java.io.IOException;
import java.util.ArrayList;
import java.util.StringTokenizer;//分割字符串
import library.Book;
public class Mall {
static ArrayList<Book > mallList= new ArrayList<Book >();
public static ArrayList<Book> getList() {
return mallList;
}
public static void showAllBook() throws NumberFormatException, IOException//抛出异常判断
{
BufferedReader in = new BufferedReader(new FileReader("F:\goods.txt"));//读取文件
String s;
Book goods;
int i=1;
while ((s = in.readLine()) != null)
{
StringTokenizer p = new StringTokenizer(s, " ");// 以" "为分隔符进行遍历
String goodsName=p.nextToken();//读取书名
String goodsPrice=p.nextToken();//读取作者
if(i<=29)
{
goods=new Books(goodsName,goodsPrice);
mallList.add(goods);
System.out.println(i+":"+goods.toString());//输出所有的书以及其作者
i++;
}
}
in.close();
}
public static ArrayList<Book> searchName(String type){//按照书名进行查找
ArrayList<Book> good = new ArrayList<Book>();
for(int i=0;i<mallList.size();i++)
{
if(mallList.get(i).getGoodsName().equals(type))
{
good.add(mallList.get(i));
}
}
return good;
}
public static ArrayList<Book> searchPrice(String type) {//按照作者查找
ArrayList<Book> good = new ArrayList<Book>();
for(int i=0;i<mallList.size();i++)
{
if(mallList.get(i).getGoodsPrice().equals(type))
{
good.add(mallList.get(i));
}
}
return good;
}
}
4.借书，还书操作
package library;
import java.util.ArrayList;
public class CartDaoLisImpl implements CartDao{
ArrayList<Item> cartList= new ArrayList<Item>();
public ArrayList<Item> getList() {
return cartList;
}
public void addBook(Book goods)
{
int i;
for(i=0;i<cartList.size();i++)
{
if(cartList.get(i).getItem().equals(goods)==true)
{
cartList.get(i).increase();
break;
}
}
if(i>=cartList.size())
{
Item e = new Item(goods);
cartList.add(e);
}
}
public void deleteBook(int num)
{
if(cartList.size()==0)
{
System.out.println("你的借阅记录为空");
return;
}
if(num<cartList.size())
{
if(cartList.get(num).getNum()==1)
{
cartList.remove(num);
}
else
{
cartList.get(num).reduce();
}
}
if(num>cartList.size())
{
System.out.println("该书籍还未收集");
}
}
public void showCart()//查看借阅的书的记录
{
for(int i=0;i<cartList.size();i++)
{
System.out.println((i+1)+":"+cartList.get(i).toString());
}
}
public void clearCart()//归还所有的书
{
cartList.clear();
}
}
class Item
{
private Book item; //记录借阅的书
private int num; //记录借阅的书的数量
public Item(Book item)
{
this.item = item;
num = 1;
}
public void increase() //再次借书
{
num++;
}
public void reduce() //归还书籍
{
num--;
}
@Override
public String toString() {
return item + " 数量：" + num;
}
public Book getItem() {
return item;
}
public void setItem(Book item) {
this.item = item;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
}